CVE-2018-7287 : Vulnerability Insights and Analysis
Discover the impact of CVE-2018-7287 on Asterisk versions 15.x through 15.2.1. Learn about the mishandling of WebSocket payloads and how to mitigate this denial of service vulnerability.
A problem was found in the file res_http_websocket.c in versions 15.x through 15.2.1 of Asterisk, impacting the handling of WebSocket payloads.
Understanding CVE-2018-7287
What is CVE-2018-7287?
An issue in Asterisk versions 15.x through 15.2.1 causes a busy loop when handling WebSocket payloads of size 0, specifically when the HTTP server is activated.
The Impact of CVE-2018-7287
This vulnerability can lead to denial of service (DoS) due to the mishandling of WebSocket payloads, potentially causing a busy loop.
Technical Details of CVE-2018-7287
Vulnerability Description
The problem lies in the mishandling of WebSocket payloads with a size of 0 when the HTTP server is enabled in Asterisk versions 15.x through 15.2.1.
Affected Systems and Versions
- Product: Asterisk
- Vendor: N/A
- Versions: 15.x through 15.2.1
Exploitation Mechanism
The vulnerability can be exploited by sending WebSocket payloads with a size of 0 when the HTTP server is activated.
Mitigation and Prevention
Immediate Steps to Take
- Disable the HTTP server if not required to mitigate the vulnerability.
- Monitor network traffic for any unusual WebSocket payloads.
Long-Term Security Practices
- Regularly update Asterisk to the latest version to patch known vulnerabilities.
Patching and Updates
Apply patches provided by Asterisk to address the WebSocket payload handling issue.